Indexable cutting inserts and methods for producing the same

a technology of indexable cutting inserts and cutting inserts, which is applied in the direction of cutting inserts, shaping cutters, manufacturing tools, etc., can solve the problems of difficult and expensive machining of “trumpet” style holes in superhard materials, difficult to achieve the effect of machining, and difficult to accurately cu

Active Publication Date: 2008-08-05
SANDVIK INTPROP AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0011]The present invention provides devices and methods that address the above-mentioned problems, and others.

Problems solved by technology

After being used for a period of time, the area of superhard material becomes worn.
Laser cutting or EDM (electro-discharge machining) is used to cut the superhard material and it can be appreciated that machining of a “trumpet” style hole in the superhard material is quite difficult and expensive to do.
In addition, the accuracy of such cuts is problematic.

Method used

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  • Indexable cutting inserts and methods for producing the same
  • Indexable cutting inserts and methods for producing the same
  • Indexable cutting inserts and methods for producing the same

Examples

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Embodiment Construction

[0024]Exemplary arrangements and techniques according to the present invention will now be described by reference to the drawing figures.

[0025]According to the present invention, a blank is formed from a superhard cutting material. The blank can also be formed from at least one hard material and at least one superhard cutting material. An illustrative embodiment of such a latter blank is shown in FIGS. 1A, 1B, 2A and 2B. As shown therein, the blank 10 comprises a top layer or portion 11 of a superhard material and a bottom layer or portion 12 of a hard material. While the blank 10 is illustrated as having a polygonal-like shape, other geometries are clearly possible, such as circular.

[0026]Generally, the superhard cutting material and the hard material are sintered together using conventional high-pressure and high-temperature techniques to form a solid body in disc form. Such techniques are conventional and are disclosed, for example, in U.S. Pat. No. 5,676,496. When made only of a...

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Abstract

A cutting insert has a body formed of a superhard material or a superhard material and a cemented carbide, and has a hole through said body and a preformed hole inlay in said hole to allow securing of the insert to a holder. The method of making same is also disclosed.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]The present application is a continuation-in-part of pending application Ser. No. 10 / 857,922 filed Jun. 2, 2004.BACKGROUND OF THE INVENTION[0002]The present invention relates to cutting inserts having cutting edges formed from a superhard abrasive material, and methods of making the same.[0003]In the description of the background of the present invention that follows reference is made to certain structures and methods, however, such references should not necessarily be construed as an admission that these structures and methods qualify as prior art under the applicable statutory provisions. Applicants reserve the right to demonstrate that any of the referenced subject matter does not constitute prior art with regard to the present invention.[0004]Indexable cutting inserts using a superhard material for cutting typically have a polygonal shape with the superhard material disposed at the corners of the polygon. The superhard material, often ...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): B23B27/16B23B27/14B23B27/18B26D1/00C23C30/00
CPCB23B27/145C23C30/005B23B2200/3618B23B2226/125B23B2226/315Y10T407/1936Y10T407/26Y10T407/27Y10T407/23B23B2240/08B23B27/14B23B27/18
Inventor SJOGREN, CLASLINDHOLM, MIKAEL
Owner SANDVIK INTPROP AB
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